#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center; 
  width: 100vw;
  height: 100vh;
}
html,body{
  margin: 0;
  padding: 0;
}
